The patch titled
Subject: kasan: add __must_check annotations to kasan hooks
has been removed from the -mm tree. Its filename was
kasan-add-__must_check-annotations-to-kasan-hooks.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: add __must_check annotations to kasan hooks
This patch adds __must_check annotations to kasan hooks that return a
pointer to make sure that a tagged pointer always gets propagated.
Link: http://lkml.kernel.org/r/03b269c5e453945f724bfca3159d4e1333a8fb1c.1544099024.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Suggested-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/include/linux/kasan.h~kasan-add-__must_check-annotations-to-kasan-hooks
+++ a/include/linux/kasan.h
@@ -49,16 +49,20 @@ void kasan_cache_create(struct kmem_cach
void kasan_poison_slab(struct page *page);
void kasan_unpoison_object_data(struct kmem_cache *cache, void *object);
void kasan_poison_object_data(struct kmem_cache *cache, void *object);
-void *kasan_init_slab_obj(struct kmem_cache *cache, const void *object);
+void * __must_check kasan_init_slab_obj(struct kmem_cache *cache,
+ const void *object);
-void *kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags);
+void * __must_check kasan_kmalloc_large(const void *ptr, size_t size,
+ gfp_t flags);
void kasan_kfree_large(void *ptr, unsigned long ip);
void kasan_poison_kfree(void *ptr, unsigned long ip);
-void *kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size,
- gfp_t flags);
-void *kasan_krealloc(const void *object, size_t new_size, gfp_t flags);
+void * __must_check kasan_kmalloc(struct kmem_cache *s, const void *object,
+ size_t size, gfp_t flags);
+void * __must_check kasan_krealloc(const void *object, size_t new_size,
+ gfp_t flags);
-void *kasan_slab_alloc(struct kmem_cache *s, void *object, gfp_t flags);
+void * __must_check kasan_slab_alloc(struct kmem_cache *s, void *object,
+ gfp_t flags);
bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned long ip);
struct kasan_cache {
--- a/mm/kasan/common.c~kasan-add-__must_check-annotations-to-kasan-hooks
+++ a/mm/kasan/common.c
@@ -373,7 +373,8 @@ static u8 assign_tag(struct kmem_cache *
#endif
}
-void *kasan_init_slab_obj(struct kmem_cache *cache, const void *object)
+void * __must_check kasan_init_slab_obj(struct kmem_cache *cache,
+ const void *object)
{
struct kasan_alloc_meta *alloc_info;
@@ -389,7 +390,8 @@ void *kasan_init_slab_obj(struct kmem_ca
return (void *)object;
}
-void *kasan_slab_alloc(struct kmem_cache *cache, void *object, gfp_t flags)
+void * __must_check kasan_slab_alloc(struct kmem_cache *cache, void *object,
+ gfp_t flags)
{
return kasan_kmalloc(cache, object, cache->object_size, flags);
}
@@ -449,8 +451,8 @@ bool kasan_slab_free(struct kmem_cache *
return __kasan_slab_free(cache, object, ip, true);
}
-void *kasan_kmalloc(struct kmem_cache *cache, const void *object, size_t size,
- gfp_t flags)
+void * __must_check kasan_kmalloc(struct kmem_cache *cache, const void *object,
+ size_t size, gfp_t flags)
{
unsigned long redzone_start;
unsigned long redzone_end;
@@ -482,7 +484,8 @@ void *kasan_kmalloc(struct kmem_cache *c
}
EXPORT_SYMBOL(kasan_kmalloc);
-void *kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags)
+void * __must_check kasan_kmalloc_large(const void *ptr, size_t size,
+ gfp_t flags)
{
struct page *page;
unsigned long redzone_start;
@@ -506,7 +509,7 @@ void *kasan_kmalloc_large(const void *pt
return (void *)ptr;
}
-void *kasan_krealloc(const void *object, size_t size, gfp_t flags)
+void * __must_check kasan_krealloc(const void *object, size_t size, gfp_t flags)
{
struct page *page;
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
